Diestock



M. CRAMER. DIESTOCIK. APPLICATION FILED Minn. 1920.

2 'SHEETSSHEET I.

ATTORNEYS Patented Nov. 15, 1921.

M. CRAMER. DIESTOCK. APPLICATION FILED, MAIL-l3. 1920.

1,397,243. Patented Nov. 15, 1921.

2 SHEETS-SHEET 2- ATTORNEYS NiTED STATES @Fi itjE DIESTOGK.

emmas.

Specification of Letters Patent.

Patented Nov. 15,1921,

Application filed March 13, 1920. SerialNo. 365,461.

To all whom it may concern:

Be it known that I, MORRIS CRAMER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Diestocks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

The object of this invention is to provide a very simple, eflicient and compact multiple die stock adapted for use of plumbers, gas fitters, steam fitters, etc. It provides means whereby with one tool a number of sizes of pipes may be threaded without any change in the tool or dies. A more specific object of this invention is to so arrange the die stock that it may be constructed of a single integral frame, carrying the dies and guide bushing therefor, in a substantially medial plane with relation to the handles of the stock. Other objects include convenience of replacement of the dies, and accessibility for adjustment thereof.

In the drawings, Figure 1 is a side elevation of my die stock, Fig. 2 is an end elevation, that is looking toward the die stock along one of its handles, Fig. 3 is a transverse section taken substantially along the plane extending through the handles, while Fig. 4 is a central section at right angles to Fig. 3.

My invention readily adapts itself for a die stock carrying four sizes of dies and such is the construction shown in the drawings, in which the frame of the die stock designated 1 comprises a single casting, somewhat globular in shape and having equally spaced outwardly projecting bosses for the guiding bushings, and having bosses at right angles thereto for the handles, producing in general a shape corresponding to a jackstone.

The casting is made hollow for the most part while it is provided with ways or seats 5, comprising flat members supporting the inner sides of the dies 10. The sides of the dies are guided by parallel surfaces or ribs 6. Extending outwardly from these rib 6, are surfaces forming the sides of openings 8, between the supports 9 for the annular sockets 11 into which the guide bushings 15 are removably fitted. The members 9 and 11 form the outwardly projecting bosses and as stated are so cut away as to leave openings 8, which it will be seen from the inspection of Figs. 1 and 2 admit the dies for placing them in position and removing them.

The fdies are in the usual construction, havlng openings through which securing screws 20 may extend, the openings being elongated to allow for adjustment by means of screws such as indicated at 22. The screws 22 extend through bosses 23 projecting outwardly from the substantially circular bosses 25, the central portions of which are threaded to receive the handles 30. The interior of the casting is cored out as much as possible commensurate with the desired strength. For example, squared cavities occur within the supports 5, at the inner ends of the handles. These cavities open into an enlarged cavity into which the ends of the dies project, and surrounding this cavity, which opens, outwardly at 8 as described, are walls of a thickness sufficient only to provide rigid support and connections between the die supports and the guide bushings. This construction is apparent from the sectional view of Fig. 4.

From the foregoing, it will be seen, that I have provided a die stock frame which may conveniently carry four or more sets of dies in guide-ways substantially parallel with the handles, whereby they may operate upon a pipe whose axis lies in a medial plane with relation to the die stock handles; and that the guide bushings for each set of dies being outside of and closely adjacent to the dies, allows the threading of comparatively short lengths of pipe. It will further be seen that the die stock is self-contained, neat in appearance and that its projections, namely the bosses, are 0 arranged as to protect the dies and screws, whereby practically no harm may result from rough handling or dropping the die stock. It, is comparatively light and yet very rigid and durable.

Having thus described. my invention, 1 claim:

1. In a die stock, the combination of a hollow integral frame, alined handles carried by the ends of the frame, a plurality of sets of dies and guiding bushings therefor, arranged in a medial plane with relation to the handle, the frame having carrier bosses for the bushings arranged to position each bushing outside of its set of dies.

2. In a die stock, the combination of a hollow frame, alined bosses for receiving frame, and handles carried by the end bosses.-

handles, a plurality of guidessubstantially parallel with the handles and at each side of a medial plane, means for adjustably securing the dies in the said guides,the frame having walls connecting said guides and projecting outwardly, hollow bosses with which said outwardly projecting walls merge, said bosl being each arranged to carry a guide bushing in alinement with a set of dies, the

outward projecting portions being so separated as to admit the dies being placed in positionfrom the exterior of the frame.

3. Ina die stock, the combination oft-he frame com TJllSlIl end bosses a Jluralit r of a a l guide -w ys formed on the sides of said bosses, walls connecting said boesfesand extending outwardly at each side of the guideways,bnshings carried bythe outwardly extending portions, said portions being se arated, leaving space toallow placing the dies inposition from the exterior of the 4. In a die stock, the combination ofan ln tegral hollow frame comprising bosses at opposite 'ends for receiving the handles,

' guide-ways having a plurality of sets of dies equally spaced about said bosses and substantially parallel with the handles whereby the ends of 'thedies project in-. wardly therefrom, hollow bosses havlng i guide bushings for each set of dies, walls ceive one of a pair of dieswhereby a plurality of dies may be carried in alinement with their ends projecting inwardly past guideways to an operative position, walls connecting said bosses and extending outwardly over said dies, hollow rings on the outwardly projecting portions of the walls, each adapted to carry a bushing outside of and in alinement with a set of dies, said outwardly projecting portions being sufficiently separated as to leave an opening allowing the dies to be placed in position from the exterior of the die stock.

6. In av die-stock, the combination of a lran'le,comprising end bosses, a plurality of guideways on the sides of said bosses, walls connecting said bosses and extending outwardly at each side of. the guideways, bush-- ings carried by the outwardly extended portions, said portions being separated to leave space to allow placing of the dies in posi tion from the exterior of the frame, and to leaveopenings adjacent said dies to allow escape of the cuttings. l

7. In a die stock, the combination ofza frame, comprising end bosses, a plurality of guideways therefor on the sides-of said bosses, walls connecting saidbosses and e'x-s tending outwardly at each side of the guidefMoRRIs CIR-AMER.

ways and uniting medially of said guide ways to form worlrguiding bosses. 

